Epinephrine Signaling Pathway Adaptation
Researchers observed that mammals adapted to frequent stress exhibit faster glycogen breakdown in response to epinephrine. Which of the following molecular adaptations would most likely account for this accelerated response?
A
Reduced affinity of epinephrine for its receptor
B
Increased adenylyl cyclase activity to boost cAMP production
C
Elimination of the G protein intermediate step
D
Fewer β-adrenergic receptors on hepatocyte membranes
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